CN203513016U - Power supply open-phase protection device of lift control cabinet - Google Patents

Power supply open-phase protection device of lift control cabinet Download PDF

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Publication number
CN203513016U
CN203513016U CN201320517542.7U CN201320517542U CN203513016U CN 203513016 U CN203513016 U CN 203513016U CN 201320517542 U CN201320517542 U CN 201320517542U CN 203513016 U CN203513016 U CN 203513016U
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CN
China
Prior art keywords
phase
circuit
open
power supply
elevator
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Withdrawn - After Issue
Application number
CN201320517542.7U
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Chinese (zh)
Inventor
张方爽
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TIANJIN HAOYA SCIENCE & TECHNOLOGY DEVELOPMENT Co Ltd
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TIANJIN HAOYA SCIENCE & TECHNOLOGY DEVELOPMENT Co Ltd
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Priority to CN201320517542.7U priority Critical patent/CN203513016U/en
Application granted granted Critical
Publication of CN203513016U publication Critical patent/CN203513016U/en
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Withdrawn - After Issue legal-status Critical Current

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Abstract

The utility model provides a power supply open-phase protection device of a lift control cabinet. The power supply open-phase protection device of the lift control cabinet comprises an open-phase detecting device and an open-phase protection output device, wherein the open-phase detecting device and the open-phase protection output device are arranged in an integrated controller of a lift. The phase voltage of a power source is detected by a photoelectric coupler. When a power supply open-phase fault occurs, a frequency converter outputs a resisting circuit, so that flowing of a current in a static element is blocked. A power supply line of a lift driving motor is disconnected by an open-phase protection relay circuit through a contactor contact of a lift safety operation control circuit. An open-phase indication circuit displays whether the open-phase fault happens to a three-phase power source or not. The power supply open-phase protection device of the lift control cabinet is suitable for a lift electrical system with the lift integrated controller adopted. By the adoption of the power supply open-phase protection device of the lift control cabinet, the structure and technology of the lift control cabinet can be simplified and production cost can be reduced.

Description

A kind of elevator control cabinet power supply open phase protection
Technical field
The utility model relates to the electrical equipment of elevator, specifically, is a kind of device of elevator supply circuit generation open phase fault being implemented safety guard-safeguard in elevator control cabinet.
Background technology
In view of elevator is manned special equipment; for ensureing the safe in operation of elevator; to power supply disconnected, fault-phase protection is had relatively high expectations and have strict verification arrangement, the power supply of every elevator is disconnected, fault-phase protection must can place in operation through the quality inspection technical body side of being up to the standards.
Relevant national legislation standard is disconnected about elevator supply, the technical requirements of fault-phase protection has:
A. elevator should possess the disconnected phase of electric power system and fault-phase protection function.When mutually disconnected or misphase appear in elevator supply circuit, elevator should be out of service and be kept halted state.
B. elevator operation is irrelevant with phase sequence, can not establish fault-phase protection function.
C. cut off the inspection that drives main frame power supply and failure of current situation thereof:
By exchanging or the direct electrical motor of power supply of direct supply, must with two independently contactless switch cut off the electricity supply, the contact of contactless switch should be series in power circuit.When elevator stops, if the main contact of one of them contactless switch is not opened, when the most late service direction next time changes, must prevent that car from reruning.
By exchanging or DC motor static cell Power supply and control, should adopt a kind of in following method:
A) with two independently contactless switch cut off motor current.
When elevator stops, if the main contact of one of them contactless switch is not opened, when the most late service direction next time changes, must prevent that car from reruning.
B) system being formed by following element:
1) cut off the contactless switch of each phase (utmost point) electric current.
At least before each change service direction, answer releasing contactor coil.If contactless switch does not discharge, should prevent that elevator from reruning.
2) be used for blocking the control setup of current flowing in static cell.
3) control monitor unit of current flowing blocking-up situation while being used for checking elevator at every turn to stop.
During orderly shutdown, if static cell is failed flowing of actv. blocking-up electric current, control monitor unit should make contactless switch discharge and should prevent that elevator from reruning.
For meeting above-mentioned requirements, the elevator control cabinet of prior art is all provided with dislocation phase protective relay.The input end of dislocation phase protective relay is connected with elevator power supply source, and mouth is connected with elevator safety circuit, running control circuit; By dislocation phase protective relay, detect and export disconnected, the misphase breakdown signal of elevator power supply source, by elevator safety circuit, running control circuit, cut off and drive main frame to power.
Existing elevator generally adopts frequency control electric drive system, and application continuum electric life controller is assembled the current technology such as elevator control cabinet.Frequency converter is wherein provided with default-phase protection function conventionally.Application number is 201220069240.3; name is called the utility model patent of " a kind of frequency converter open-phase protection circuit "; and application number is 200710124003.6 or 201110272422.0; name is called the patent of invention of " a kind of three-phase power input phase-loss detection circuit ", discloses frequency converter open-phase protection circuit.Technique scheme is for General Electric's equipment; be not easy to realize and use contactless switch to cut off the functions such as supply line, static cell blocks current flow and disconnected indication mutually; it not yet meets the embodiment of open-phase protection, and national legislation standard is disconnected to elevator, the concrete technical requirements of fault-phase protection, is difficult to by the check of quality inspection technical body.
Utility model content
The purpose of this utility model is in order to overcome the deficiencies in the prior art, and a kind of elevator control cabinet power supply phase-lacking protective device that is arranged at elevator integrated controller is provided.
The utility model solves the technical scheme that its technical matters adopts: elevator control cabinet power supply open phase protection comprises phase interruption testing device and open-phase protection output unit, and described phase interruption testing device and open-phase protection output unit are arranged at elevator integrated controller; Described phase interruption testing device is by power acquisition collector and the disconnected the electric circuit constitute of identifying mutually, and open-phase protection output unit is comprised of frequency converter output blocking circuit and phase failure relay circuit etc.; The input end of described power acquisition collector is connected with three-phase power input end of elevator integrated controller, and mouth is identified mutually circuit input end and is connected with disconnected; The mouth of disconnected phase identification circuit is connected with the input end of frequency converter output blocking circuit, phase failure relay circuit; When recognizing the disconnected phase time of power supply of elevator control cabinet; by frequency converter output blocking circuit, realize " current flowing in blocking-up static cell "; mouth by phase failure relay circuit is connected with elevator safety operation control circuit, is cut off the supply line of elevator drive electrical motor by elevator safety operation control circuit.
Described elevator control cabinet power supply open phase protection, its phase interruption testing device can be the testing circuit based on photoelectrical coupler technology, comprise the rectifier diode and the limiting capacitor that are connected to power supply first-phase, by rectifier diode and limiting capacitor, form first-phase half-wave rectifying circuit; Power supply second-phase half-wave rectifying circuit is identical with the structure of first-phase half-wave rectifying circuit; First-phase, second-phase half-wave rectifying circuit access respectively zener diode and filter capacitor as load; The anode of first, second photoelectrical coupler is connected respectively to the positive pole of first-phase, second-phase power supply half-wave rectifying circuit after serial connection current-limiting resistance, and its negative electrode is connected respectively to the negative pole of first-phase, second-phase power supply half-wave rectifying circuit; The emitter of the first photoelectrical coupler is connected with the collecting electrode of the second photoelectrical coupler.
Described elevator control cabinet power supply open phase protection; its open-phase protection output unit can comprise disconnected phase indicating circuit; the input end of disconnected phase indicating circuit is identified mutually circuit output end and is connected with disconnected, and the display device of the phase indicating circuit that breaks is arranged on the surface of elevator integrated controller.
The utility model compared with prior art; have the following advantages and beneficial effect: elevator control cabinet power supply open phase protection is arranged at elevator integrated controller; replaced discrete dislocation phase protective relay; can simplify elevator control cabinet structure and technique, save production cost, can meet that national legislation standard is disconnected to elevator, the concrete technical requirements of fault-phase protection.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the constructional drawing of the utility model embodiment.
Fig. 2 is the phase interruption testing device circuit diagram of the utility model embodiment.
In figure, 1. disconnected phase identification circuit 4. frequency converters of three-phase power input end 2. power acquisition collector 3. are exported blocking circuit 5. phase failure relay circuit 6. elevator safety operation control circuit 7. phase indicator circuit 8. elevator integrated controllers.
The specific embodiment
Constructional drawing embodiment illustrated in fig. 1 is applicable to adopt the elevator control cabinet of elevator integrated controller assembling.Elevator integrated controller is that frequency converter and elevator are controlled to the device that microcomputer plate unites two into one, and application is universal gradually.Open phase protection is arranged among elevator integrated controller, has replaced in prior art the dislocation phase protective relay in the discrete setting of elevator control cabinet.
In Fig. 1, the input end of power acquisition collector (2) is directly connected to three-phase power input end (1) of elevator integrated controller (8), and the information of three phase mains is sent to disconnected phase identification circuit (3).Disconnected phase identification circuit (3) is the testing circuit based on photoelectrical coupler technology, when wherein mutually or when two-phase is opened circuit of three phase mains, drive immediately the action of open-phase protection output unit, by frequency converter output blocking circuit (4) " current flowing in blocking-up static cell ", normally in frequency converter, DSP circuit is realized; Mouth by phase failure relay circuit (5) is connected with elevator safety operation control circuit (6), cuts off the supply line of elevator drive electrical motor by the contacts of contactor of elevator safety operation control circuit; By phase indicator circuit (7), shown in real time without open phase fault, to facilitate check and upkeep operation.
Fig. 2 is the disconnected embodiment circuit diagram that detects mutually based on photoelectrical coupler technology.In figure, rectifier diode (D1) forms first-phase half-wave rectifying circuit with current limiting capacitance (C1), and zener diode (D3) is load with filter capacitor (C2); Rectifier diode (D2) forms second-phase half-wave rectifying circuit with current limiting capacitance (C1), and zener diode (D4) is load with filter capacitor (C3); This circuit is used two photoelectrical couplers to detect input power, the input end of the first photoelectrical coupler (U1), the second photoelectrical coupler (U2) is connected in series respectively current-limiting resistance (R1), (R2) is connected to first-phase, second-phase half-wave rectifying circuit afterwards, (U1), the mouth of (U2) is connected in series, (U1) collecting electrode connects and controls power supply (+) through resistance (R3), and (U2) emitter connects and controls power supply (GED).Filter capacitor (C2) is designed to drive (U1), (U2) operate in saturation 1/20 to 1/40 second with loading capacity (C3).When power supply is normal, (U1), (U2) maintain saturation conduction, circuit output point (PL) is low level; When there is the disconnected phase time of power supply, (U1), (U2) cut-off, circuit output point (PL) is high level.This open-phase detection circuit can be by simple low and high level judgement testing result, and its output both can directly be connected with digital circuit, also can directly be connected with analogous circuit, did not need software computing, and simple circuit is easy to use.Application photoelectrical coupler detects, and its mouth has been realized the electrical isolation to power supply, and antijamming capability is strong, and working stability is reliable.
Below with embodiment, the utility model has been carried out launching to describe by reference to the accompanying drawings, this description does not have restricted, the embodiment that shown in accompanying drawing, also just the utility model forms, and the technical solution of the utility model is not limited to this.Those of ordinary skill in the art should be understood that, in the situation that not departing from the utility model design philosophy, and the actual variation in some details of implementing also to have of the present utility model.So as long as meet aim of the present utility model, these variations include within protection domain of the present utility model.

Claims (3)

1. an elevator control cabinet power supply open phase protection, comprises phase interruption testing device and open-phase protection output unit, it is characterized in that: described phase interruption testing device and open-phase protection output unit are arranged at elevator integrated controller; Described phase interruption testing device is by power acquisition collector and the disconnected the electric circuit constitute of identifying mutually, and open-phase protection output unit is by frequency converter output blocking circuit and phase failure relay the electric circuit constitute; The input end of described power acquisition collector is connected with three-phase power input end of elevator integrated controller, and mouth is identified mutually circuit input end and is connected with disconnected; The mouth of disconnected phase identification circuit is connected with the input end of frequency converter output blocking circuit, phase failure relay circuit, and the mouth of phase failure relay circuit is connected with elevator safety operation control circuit; When recognizing the disconnected phase time of power supply of elevator control cabinet, by frequency converter output blocking circuit, realize " current flowing in blocking-up static cell ", by elevator safety operation control circuit, cut off the supply line of elevator drive electrical motor.
2. elevator control cabinet as claimed in claim 1 power supply open phase protection, it is characterized in that: described phase interruption testing device is the testing circuit based on photoelectrical coupler technology, comprise the rectifier diode and the limiting capacitor that are connected to power supply first-phase, by rectifier diode and limiting capacitor, form first-phase half-wave rectifying circuit; Power supply second-phase half-wave rectifying circuit is identical with the structure of first-phase half-wave rectifying circuit; First-phase, second-phase half-wave rectifying circuit access respectively zener diode and filter capacitor as load; The anode of first, second photoelectrical coupler is connected respectively to the positive pole of first-phase, second-phase power supply half-wave rectifying circuit after serial connection current-limiting resistance, and its negative electrode is connected respectively to the negative pole of first-phase, second-phase power supply half-wave rectifying circuit; The emitter of the first photoelectrical coupler is connected with the collecting electrode of the second photoelectrical coupler.
3. elevator control cabinet as claimed in claim 1 power supply open phase protection; it is characterized in that: described open-phase protection output unit comprises disconnected phase indicating circuit; the input end of disconnected phase indicating circuit is identified mutually circuit output end and is connected with disconnected, and the display device of the phase indicating circuit that breaks is arranged on the surface of elevator integrated controller.
CN201320517542.7U 2013-08-22 2013-08-22 Power supply open-phase protection device of lift control cabinet Withdrawn - After Issue CN203513016U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320517542.7U CN203513016U (en) 2013-08-22 2013-08-22 Power supply open-phase protection device of lift control cabinet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320517542.7U CN203513016U (en) 2013-08-22 2013-08-22 Power supply open-phase protection device of lift control cabinet

Publications (1)

Publication Number Publication Date
CN203513016U true CN203513016U (en) 2014-04-02

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CN201320517542.7U Withdrawn - After Issue CN203513016U (en) 2013-08-22 2013-08-22 Power supply open-phase protection device of lift control cabinet

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103434907A (en) * 2013-08-22 2013-12-11 天津豪雅科技发展有限公司 Power supply open-phase protection device of elevator control cabinet
CN107317304A (en) * 2017-07-01 2017-11-03 合肥东玖电气有限公司 A kind of Current Transformer Secondary dypass voltage protection circuit
CN108861902A (en) * 2017-05-15 2018-11-23 通力股份公司 The failure of current device of elevator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103434907A (en) * 2013-08-22 2013-12-11 天津豪雅科技发展有限公司 Power supply open-phase protection device of elevator control cabinet
CN103434907B (en) * 2013-08-22 2015-12-23 宁波赛福特电子有限公司 A kind of elevator control cabinet is powered phase-lacking protective device
CN108861902A (en) * 2017-05-15 2018-11-23 通力股份公司 The failure of current device of elevator
CN108861902B (en) * 2017-05-15 2022-04-12 通力股份公司 Current cut-off device for elevator
CN107317304A (en) * 2017-07-01 2017-11-03 合肥东玖电气有限公司 A kind of Current Transformer Secondary dypass voltage protection circuit

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C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20140402

Effective date of abandoning: 20151223

C25 Abandonment of patent right or utility model to avoid double patenting